
AR Uppers & Kits
- In StockCMMG Resolute MK4 .22 ARC 16.1in Charcoal Green Upper Receiver Group (28B260C-CG)Zeroed AR15 polymer dust coverZeroed AR15 ambi charging handleZeroed muzzle brake 5.56mmBrings 22-250 performance to the AR15 platformComes ready to pair with any AR15 lower groupComes complete ...$734.93
- In StockCMMG Resolute MK4 .22 ARC 16.1in Coyote Tan Upper Receiver Group (28B260C-CT)Zeroed AR15 polymer dust coverZeroed AR15 ambi charging handleZeroed muzzle brake 5.56mmBrings 22-250 performance to the AR15 platformComes ready to pair with any AR15 lower groupComes complete ...$714.99
- In StockCMMG Resolute MK4 .22 ARC 16.1in Midnight Bronze Upper Receiver Group (28B260C-MB)Zeroed AR15 polymer dust coverZeroed AR15 ambi charging handleZeroed muzzle brake 5.56mmBrings 22-250 performance to the AR15 platformComes ready to pair with any AR15 lower groupComes complete ...14% off$729.99$849.99
- In StockCMMG Resolute MK4 .22 ARC 16.1in Sniper Grey Upper Receiver Group (28B260C-SG)Zeroed AR15 polymer dust coverZeroed AR15 ambi charging handleZeroed muzzle brake 5.56mmBrings 22-250 performance to the AR15 platformComes ready to pair with any AR15 lower groupComes complete ...$734.93
- In StockCMMG Resolute MK4 .22 ARC 16.1in Titanium Upper Receiver Group (28B260C-TI)Zeroed AR15 polymer dust coverZeroed AR15 ambi charging handleZeroed muzzle brake 5.56mmBrings 22-250 performance to the AR15 platformComes ready to pair with any AR15 lower groupComes complete ...$734.93
- In StockCMMG Resolute MK4 .22 ARC 16.1in Tungsten Upper Receiver Group (28B260C-TNG)Zeroed AR15 polymer dust coverZeroed AR15 ambi charging handleZeroed muzzle brake 5.56mmBrings 22-250 performance to the AR15 platformComes ready to pair with any AR15 lower groupComes complete ...$734.93
- In StockCMMG Endeavor MK4 .22 ARC 20in Coyote Tan Upper Receiver Group (28B3D0C-CT)Zeroed AR15 ambi charging handleZeroed AR15 polymer dust coverZeroed muzzle brake 5.56mmBrings 22-250 performance to the lighter-weight AR15 (MK4) platformIncludes the bolt carrier group Endeavor ...$775.31
- In StockCMMG Dissent MK4 .22 ARC 16.1in Armor Black Upper Receiver Group (28B940C-AB)Adjustable gas block gives you the freedom to dial in the gas system exactly to your liking1913 Picatinny rail end plateFits mil-spec AR-15 lower receiversCompact Action-Direct impingement ...$1,179.08
- In StockCMMG Dissent MK4 .22 ARC 16.1in Coyote Tan Upper Receiver Group (28B940C-CT)Adjustable gas block gives you the freedom to dial in the gas system exactly to your liking1913 Picatinny rail end plateFits mil-spec AR-15 lower receiversCompact Action-Direct impingement ...$1,179.08
- In StockCMMG Dissent MK4 .22 ARC 16.1in Sniper Grey Upper Receiver Group (28B940C-SG)Adjustable gas block gives you the freedom to dial in the gas system exactly to your liking1913 Picatinny rail end plateFits mil-spec AR-15 lower receiversCompact Action-Direct impingement ...$1,179.08
- In StockCMMG Endeavor Mk4 22 Arc 20in Charcoal Green Upper Receiver Group (28B3D0C-CG)Upper Receiver: Billet 6061 T6 AluminumHand Guard: CMMG EML15 M-LOKBarrel Material: 4140CM, SBN 5.56mm is tried and true, but 22 ARC brings 22-250 performance to the lighter-weight AR15 (Mk4) ...$775.31
- In StockCMMG Endeavor Mk4 22 Arc 20in Tungsten Upper Receiver Group (28B3D0C-TNG)Upper Receiver: Billet 6061 T6 AluminumHand Guard: CMMG EML15 M-LOKBarrel Material: 4140CM, SBN 5.56mm is tried and true, but 22 ARC brings 22-250 performance to the lighter-weight AR15 (Mk4) ...$775.31
- In StockCMMG Dissent Mk4 22 Arc 16.1in Hard Coat Anodized Upper Receiver Group (28B940C-HCA)Upper Receiver: DISSENT 7075 T6 AluminumFinish: Cerakote or Hard Coat AnodizedGas Block: Adjustable 0.750"Operating System: Compact Action-Direct Impingement Build from scratch or add to ...$1,057.95
- In StockCMMG Dissent Mk4 22 Arc 16.1in Midnight Bronze Upper Receiver Group (28B940C-MB)Upper Receiver: DISSENT 7075 T6 AluminumFinish: Cerakote or Hard Coat AnodizedGas Block: Adjustable 0.750"Operating System: Compact Action-Direct Impingement Build from scratch or add to ...$1,179.08
- In StockAERO PRECISION M4E1 Threaded Assembled ODG Anodized Upper Receiver (APAR700220AC)Enhanced forging that gives the upper receiver a billet lookPicatinny profile that blends seamlessly with their Enhanced and ATLAS Series HandguardsM4 Feedramps.250 takedown pin holesLaser ...7% off$148.17$159.99
- In StockGEISSELE AUTOMATICS Super Duty MOD1 5.56mm NATO 16in Complete Upper (08-548S)Geissele airborn charging handleHuxWrx flash hider-QD muzzle device16" cold hammer forged barrelManufactured with confidence and without compromiseProvides superior ergonomics and modularity ...$1,378.50
- In StockFAXON ARAK-21 16in 7.62x39mm Complete Upper (URSSB762)Upper receiver is fully machined from an aircraft grade 6061-T6 aluminum billet in a one piece designTop picatinny rail is laser engraved for optic placementLong stroke variable setting gas piston ...$885.67
- In StockFAXON ARAK-21 12.5in 7.62x39mm Complete Upper (URSSB762P)Upper receiver is fully machined from an aircraft grade 6061-T6 aluminum billet in a one piece designTop picatinny rail is laser engraved for optic placementLong stroke variable setting gas piston ...$887.78
- In StockGEISSELE AUTOMATICS Super Duty Mod1 5.56mm 13.9in Complete Upper (08-546B)13.9in Chrome Lined BarrelSuper Duty Upper with Cam Pin Cut-OutSuper Compact Gas BlockGeissele Stressproof Bolt with Asymmetric Cam Pin12.9in SMR MK16 Rail The GEISSELE AUTOMATICS Super Duty Mod1 ...$1,232.94
- In StockYANKEE HILL MACHINE CO Turbo Integral Suppressed 5.56 NATO 10.5in Upper Receiver Group (YHM-7125)Caliber: .5.56mm NATOConstruction: 17-4 PH SS / Cobalt 6 Blast BaffleDecibel Rating: 134 dBFull Auto RatedLength: 23.5"Weight: 3.6 lbs YHM is pleased to offer the Turbo Integrally Suppressed ...$1,016.99
If we compare parts of an AR with body parts, the upper receivers are undoubtedly the heart. As you might know, this assembly of components is indispensable for making the shooting process possible. Not that lower receivers play a minor role in that shooting play, but AR upper receivers house the components responsible for crucial steps of the firing process. Unlike lower receivers, they are not considered legal firearms and thus won’t cost you any extra paperwork. At the same time, a different upper AR receiver can turn your firearm from a close quarters carbine to a long-range precision rifle. Upper receivers are the most customizable part of ARs, so the choice is ample.
AR Uppers can be classified according to different characteristics, but the one we consider most relevant for customization enthusiasts is the degree of completeness. Some people prefer their upper complete, while others opt for stripped variants. The difference is on the surface: if an upper receiver is stripped, it includes only the main piece of metal that houses other components. A complete upper receiver will have the ejection port and the forward assist button installed. In case you don’t want to trouble yourself with gathering all the components, you can get an upper receiver assembly. It’s a complete, ready-to-be-fired system that includes a charging handle, barrel, handguards, and bolt carrier group. The only thing you’ll need to shoot is to attach it to a lower receiver.
GritrSports.com is a gun store dedicated to giving our customers the widest choice possible. Here, we have dozens of upper receivers for sale. You can find them in whatever configuration you might need, be it stripped, complete, or a whole assembly. Choose from a wide selection of products manufactured by such brands as Aero Precision, Anderson, ATI, CMMG, Daniel Defense, POF, Spikes Tactical, and many others.
Complete your AR build or make a long-awaited upgrade when you shop AR uppers at GritrSports.com.